Europe Largest Isogram Cities

Name the 100 largest European cities whose names are isograms. An isogram is a word (city name in this case) with no repeating letters – i.e. no letter appears more than once. Time is short on this and time bonuses are not that much otherwise it becomes just guessing cities without thinking if they are isograms. Population and name length shown – tried to use most common English spelling when determining if city was an isogram.